Kutheni ii-welds zentsimbi engagqwaliyo ezisebenzisa i-FCAW zihlala zingaphumeleli ekuhlolweni? UDavid Meyer noRob Koltz bajonga ngokusondeleyo izizathu zezi mpazamo. Imifanekiso kaGetty
Q: Silungisa izikrweqe zentsimbi ezitshisiweyo kwinkqubo yokomisa kwindawo emanzi. Ii-weld zethu aziphumelelanga ekuhlolweni ngenxa yokuqhekeka, ukunqunyulwa okungaphantsi kunye nee-welds eziqhekekileyo. Sitshixile i-A514 ukuya kwi-A36 sisebenzisa ububanzi obuyi-0.045″, yonke indawo, i-cored 309L, i-75% Argon/25% Carbon Dioxide gas ukuze sikwazi ukumelana nokuguguleka okungcono.
Sizamile ii-electrode zentsimbi yekhabhoni, kodwa ii-welds zaphela ngokukhawuleza kwaye safumanisa ukuba intsimbi engagqwaliyo isebenza ngcono. Zonke ii-welds zenziwa kwindawo ethe tyaba, i-3/8 intshi. Ngenxa yemida yexesha, zonke ii-welds zenziwa ngexesha elinye. Yintoni enokubangela ukuba ii-welds zethu zingaphumeleli?
Ukunqunyulwa okungaphantsi kwexabiso kudla ngokubangelwa ziiparameter zokucushwa okungafanelekanga, indlela engafanelekanga yokucushwa, okanye zombini. Asinakuthetha ngeparameter zokucushwa kuba asizazi. Ukunqunyulwa okungaphantsi kwexabiso okwenzeka kwi-1F kudla ngokubangelwa kukusebenza ngokugqithisileyo kwedama lokucushwa okanye isantya sokuhamba esikhawulezayo okanye esicothayo.
Ekubeni umthungi ezama ukufaka i-3/8″. Amathuba okuphatha itotshi ngaphezulu asenokuba negalelo ekuthungeni i-fillet ye-single-pass ngentambo encinci enobubanzi obuncinci. Nangona kunjalo, kubonakala ngathi isebenzisa isixhobo esingalunganga emsebenzini kunokuba yingxaki yobuchwephesha, yiyo loo nto.
Ukuqhekeka kwegesi kubangelwa kukungcola okukwi-weld, ukulahleka okanye ukugqithisa kwegesi yokukhusela, okanye ukufunxwa komswakama okugqithisileyo kwentambo ene-flux-core. Ukhankanya ukuba lo ngumsebenzi wokulungisa kwimidiya emanzi ngaphakathi kwi-dryer, ngoko ke ukuba ii-weld azicocwanga kakuhle, oku kusenokuba yimbangela ephambili ye-voids.
Intsimbi yokuzalisa oyisebenzisayo yintambo ejikelezayo enomphetho wesikhundla, ezi ntlobo zentambo zinenkqubo ye-slag ekhawulezayo yokuqandisa. Oku kuyimfuneko ukuxhasa ichibi le-weld xa ujijela phezulu okanye ngaphezulu. Ingxaki ye-slag ekhawulezayo yokuqandisa kukuba iyaqina phambi kwechibi le-weld elingaphantsi kwalo. Ukuba iigesi zisakhululwa, zihlala zibanjwa kwaye zivele kamva ngendlela yee-pores okanye ii-surface worm tracks. Oku kuyandiswa xa ujijela kwindawo ethe tyaba ngentambo encinci yobubanzi kwaye uzama ukufaka i-weld enkulu kwi-pass enye, njengakwisicelo sakho.
Ukuqhekeka kwe-weld ekuqaleni nasekupheleni kwe-weld kunokubangelwa zizizathu ezininzi. Ekubeni ubeka i-bead enkulu enocingo oluncinci olunobubanzi, kusenokwenzeka ukuba ufumane ukudibana okwaneleyo (LOF) engcanjini ye-weld. Ukuqhekeka kwe-weld yinto eqhelekileyo ngenxa yoxinzelelo olukhulu lwe-weld olushiyekileyo kunye ne-LOF engcanjini.
Kolu hlobo locingo, kufuneka usebenzise iipasi ezimbini okanye ezintathu ukuze ugqibezele i-3/8 ye-intshi. Ii-weld ze-Fillet, akukho mntu. Ungakufumanisa kukhawuleza ukwenza ii-weld ezintathu ezingenaziphene kunokwenza i-weld enye eneziphene uze emva koko unyanzeleke ukuyilungisa.
Nangona kunjalo, enye ingxaki enokudlala indima enkulu ekuqhekekeni kwe-weld linqanaba elingachanekanga le-ferrite kwi-weld, edla ngokuba yimbangela ephambili yokuqhekeka. Intambo ye-309L yenzelwe ukudityaniswa kwentsimbi engagqwaliyo kwi-carbon steel endaweni yentsimbi yekhabhoni kwi-carbon steel. I-weld chemistry ethile yale mveliso ikwaqwalasela ukuxutywa kwesinyithi esisisiseko kuzo zombini iintsimbi ezisisiseko. Ke ngoko, kwizicelo zentsimbi engagqwaliyo kwi-carbon steel, ezinye ii-alloys ezivela kwi-stainless steel zinceda ukulinganisela ukwakheka kweekhemikhali kwaye zivelise ubungakanani obamkelekileyo be-ferrite. Ukusebenzisa isinyithi esizalisayo esine-ferrite emalunga ne-50%, efana ne-312 okanye i-2209, kuya kususa amathuba okuqhekeka ngenxa yomxholo we-ferrite ophantsi.
Eyona ndlela ilungileyo yokubonelela ngokumelana nokuguguleka okugqwesileyo kukushisela ijoyinti nge-electrode eqhelekileyo yekhabhoni okanye yentsimbi engatyiwayo uze wongeze umaleko we-electrode engaphezulu. Nangona kunjalo, ukhankanyile ukuba ubuphantsi kwemida yexesha engqongqo kakhulu kwaye nayiphi na imeko yokushisela ene-multipass yayingenakwenzeka.
Zama ukuguqula ibe yintambo enkulu enobubanzi, efana ne-1/16 intshi okanye enkulu. Ukusebenzisa intambo ene-flux-core ekhuselwe yigesi kulungile kuba ibonelela ngokucoca okungcono kwe-weld kunye nokukhusela ukuhamba komoya okungcono kuneentambo ezingena-flux-core. Nangona kunjalo, endaweni yentambo ebekwe kwindawo yonke, yintambo ethe tyaba nethe tyaba kuphela enokunciphisa ukubola okanye ukulandelela imibungu. Kuya kufuneka utshintshe isinyithi sokuzalisa ukusuka kwi-309L ukuya kwi-312 okanye kwi-2209.
I-WELDER, eyayisakuba yi-Practical Welding Today, ibonisa abantu bokwenyani abenza iimveliso esizisebenzisayo nesisebenza nazo yonke imihla. Le magazini ikhonze uluntu oludibanisa iintsimbi eMntla Melika kangangeminyaka engaphezu kwama-20.
Ngoku ngokufikelela ngokupheleleyo kuhlelo lwedijithali lwe-FABRICATOR, ukufikelela lula kwizixhobo ezixabisekileyo zoshishino.
Uhlelo lwedijithali lweThe Tube & Pipe Journal ngoku lufikeleleka ngokupheleleyo, nto leyo enika ukufikelela lula kwizixhobo ezixabisekileyo zoshishino.
Yonwabela ukufikelela ngokupheleleyo kuhlelo lwedijithali lwe-STAMPING Journal, olubonelela ngenkqubela phambili yetekhnoloji yamva nje, iindlela ezilungileyo kunye neendaba zoshishino kwimarike yokunyathela isinyithi.
Ngoku ngokufikelela ngokupheleleyo kuhlelo lwedijithali lwe-The Fabricator en Español, ukufikelela lula kwizixhobo ezixabisekileyo zoshishino.